WITH DESCRIPTIONS OF NEW SPECIES 21 



Genus SCOLOPENDRELLA, Gervais. 



I. First pair of legs well-developed, composed of three free and 

 distinctly articulated joints, excluding the trochanter, and 

 terminating in two conspicuous claws. 



1. Length 3 - o to 3*4 mm. First pair of legs more than two- 



thirds the length of the following pair, of normal shape. 

 Hind margin of each scutum with a distinct longitudinally 

 striate belt between the pair of triangular processes. Cerci 

 without the raised transverse lines at the most distal part. 

 Central cephalic rod interrupted before the middle, and there 

 branching shortly to either side. notacantha, Gervais. 



2. Length I "2. to 3*0 mm. First pair of legs at most not more than 



one-half the length of the following pair. Hind margin of 

 the scuta simple, without striate belts. Cerci with raised 

 transverse lines at the most distal part opposite to the 

 terminal area. Central cephalic rod interrupted, but without 

 the lateral branches before the middle. 



a. Nearly all the antennal setae thickened and distinctly 



pubescent. Dorsal and marginal setae and those on 

 scuta short, but more numerous and closely set. 

 Cerci a little more than four times as long as deep, 

 and clothed with a larger number of seta? differing 

 considerably in length ; terminal area and apical setae 

 short. Size larger (av. : 2*5 mm.). 



[microcolpa, Muhr.] 



b. Antennal setae naked, normal. Dorsal and marginal 



setse on scuta few, very sparsely placed and minute. 

 Cerci from three to four times as long as deep, and 

 clothed with comparatively few rather long setae un- 

 equal in length ; terminal area and apical setae both 

 long. Size smaller (av. : 1*5 mm.). 



subnuda, Hansen. 



1 1 . First pair of legs obsolete, represented by a pair of rudimentary 

 wart-like protuberances without even claws. 



1. Size usually larger and slightly more robust. The last pair of 

 legs with three long protruding dorsal setae on the meta- 

 tarsus, and four or, more usually, five similar setae in the 

 anterior dorsal row on the tarsus. The cerci rather large 

 and densely clothed with both moderately long and short 

 seta'. 



